王达业 发表于 2024-7-4 09:26

30年前的老前辈纯手工做示波器(附电路图+原理说明)

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<p><span style="font-size:16px;"><span style="font-family:Arial;">看到一篇30年前的经典之作</span></span><span style="font-size:16px;"><span style="font-family:Arial;">&mdash;&mdash;手工打造的示波器。文章不仅展示了示波器的实物图片,还详尽地提供了电路图和原理解析,令人钦佩不已。分享给大家看一下,让我们一同欣赏这份技术与智慧的结晶。</span></span></p>

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<p><span style="font-size:16px;"><span style="font-family:Arial;">30年前,没有钱买示波器,只好自己七拼八凑制作了一台示波器,性能指标肯定不能与工厂生产的相比,但只要能显示出波形我也就满意了,下面以图片介绍如下:<br />
电路原理图(参考了好几本书籍,把自己认为满意的单元重新组合而成):</span></span></p>
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<section><span style="font-size:16px;"><span style="font-family:Arial;">信号处理部分的PCB板是手工设计的:</span></span>

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<section><span style="font-size:16px;"><span style="font-family:Arial;">由于十几岁就学过木工,做过家具,所以机架部分就自然采用木头制作了,其实木头很好加工,上初中时就用三层板作收音机的PCB板:</span></span></section>

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<section><span style="font-size:16px;"><span style="font-family:Arial;">1.5CM厚的木方做机架,全部都是卯榫结构,没有用过一颗钉子,30年的岁月,有的地方脱榫了。</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">最大、最难固定的部件是显像管,它是这样固定的:</span></span></section>

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<section><span style="font-size:16px;"><span style="font-family:Arial;">我用1mm 厚的铁皮做了一个箍,象箍水桶一样把显像管箍起来,在接头处弯了一个90 度的角,用螺钉来调节松紧。在箍和显像管之间垫了一层吹塑纸作缓冲,以免将显像管箍暴。我当年是戴了帽子、眼镜、口罩,脖子上还围了围巾,手上还戴了手套,全副武装。就怕显像管受力不均后爆炸伤人,还好没爆炸。</span></span></section>

<section><span style="font-size:16px;"><span style="font-family:Arial;">那个箍每边有一个耳朵,将它们弯曲成90 度的形状,这样就可以用螺钉固定在框架上,其实我也是在修理成品电视机时看到厂家这样做的。</span></span></section>

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<section><span style="font-size:16px;"><span style="font-family:Arial;">电源 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;:</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">变压器是自己绕制的,电源的PCB板是用断锯条刻出来的。<br />
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这是高压发生器,由于干扰大,所以做一个铁皮罩子把它屏蔽起来:</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">高压变压器采用成品黑白电视机的行输出变压器代替,节省点功夫:</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">这是给显像管灯丝供电的恒流源部分:</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">这是X轴、Y轴信号处理部分:</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">这是X轴、Y轴坐标平移部分,功能就是让显示的图形上、下、左、右移动:</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">那颗螺钉很丑,真正木匠使用的螺钉,和机架是绝配。<br />
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这是X轴、Y轴功率放大部分,用的是TDA2030A,功放IC。</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">行偏转、场偏转用成品,虽然《无线电》杂志也介绍过做这个东东,但要用模具来绕制,对我当时来说太难了。</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">控制板,一堆电位器,控制&ldquo;亮度&rdquo;、&ldquo;聚焦&rdquo;、&ldquo;移动&rdquo;、&ldquo;增益&rdquo;、&ldquo;同步&rdquo;等。</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">接上&ldquo;信号发生器&rdquo;,显示正弦波的情况,由于当时没有示波器来调试,所以扫描逆程的的消隐没有做好,没有完全消除逆程回扫线,现在也没有闲心来调试了。</span></span></section>

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<span style="font-size:16px;"><span style="font-family:Arial;">下面是我当时在单位系统内投稿的原件,就作为这台示波器的原理说明吧:</span></span></section>

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吾妻思萌 发表于 2024-7-4 10:18

<p>拜服,模拟电子的老神仙。</p>

miaods2002 发表于 2024-7-4 11:20

<p>顶级佩服!!!楼主技术了得,毅力更是强大!<img height="48" src="https://bbs.eeworld.com.cn/static/editor/plugins/hkemoji/sticker/facebook/wanwan88.gif" width="59" /></p>

Verifone 发表于 2024-7-4 11:26

<p>佩服,老法师了,模拟技术的高峰水准,我辈楷模</p>

蓝天777 发表于 2024-7-4 12:01

<p>牛!还是以前的人聪敏!</p>

x2233445566 发表于 2024-7-4 13:45

<p><img height="48" src="https://bbs.eeworld.com.cn/static/editor/plugins/hkemoji/sticker/facebook/wanwan88.gif" width="59" /></p>

okhxyyo 发表于 2024-7-4 16:50

<p>这个厉害了~~真的是手艺人呀~~</p>

UUC 发表于 2024-7-7 10:33

<p>向工匠精神致敬!创新力、思考力、行动力结合的完美诠释,值得学习~</p>

hellokitty_bean 发表于 2024-7-9 09:58

<p>致敬致敬。。。这份技术与智慧的结晶。早年的DIY精神可钦可佩!</p>

qfnurz 发表于 2024-7-13 10:29

<p>人才啊,不只是电子人才,还是书法人才啊,佩服楼主</p>

freebsder 发表于 2024-7-15 18:38

<p>手艺活,向老前辈致敬!</p>

eric_wang 发表于 2024-8-1 18:04

<p>大佬级人物,牛啊!</p>
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